CA2019000A1 - Cellular telephone responsive to service availability for operating on different cellular telephone systems - Google Patents

Cellular telephone responsive to service availability for operating on different cellular telephone systems

Info

Publication number
CA2019000A1
CA2019000A1 CA2019000A CA2019000A CA2019000A1 CA 2019000 A1 CA2019000 A1 CA 2019000A1 CA 2019000 A CA2019000 A CA 2019000A CA 2019000 A CA2019000 A CA 2019000A CA 2019000 A1 CA2019000 A1 CA 2019000A1
Authority
CA
Canada
Prior art keywords
cellular telephone
operating
dual
responsive
service availability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2019000A
Other languages
French (fr)
Other versions
CA2019000C (en
Inventor
Ali Pireh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/511,882 external-priority patent/US5008925A/en
Application filed by Motorola Inc filed Critical Motorola Inc
Publication of CA2019000A1 publication Critical patent/CA2019000A1/en
Application granted granted Critical
Publication of CA2019000C publication Critical patent/CA2019000C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

CELLULAR TELEPHONE RESPONSIVE TO
SERVICE AVAILABILITY FOR OPERATING
ON DIFFERENT CELLULAR TELEPHONE SYSTEMS

Abstract of the Disclosure A unique dual-system cellular telephone includes a transceiver (100) having a dual bandwidth receiver, an audio/logic unit (200) having dual control programs, and a handset unit (300). The dual bandwidth receiver of the transceiver (100) has different filters (408 and 410) in the intermediate frequency section thereof which are switchably selected depending on which cellular telephone system is available. When service is not available in one of the cellular telephone systems, the unique cellular telephone automatically switches the receiver bandwidth and control program for operating on the other cellular telephone system.
CA002019000A 1989-06-23 1990-06-14 Cellular telephone responsive to service availability for operating on different cellular telephone systems Expired - Lifetime CA2019000C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US37067589A 1989-06-23 1989-06-23
US370,675 1989-06-23
US511,882 1990-04-20
US07/511,882 US5008925A (en) 1989-12-20 1990-04-20 Cellular telephone responsive to service availability for operating on different cellular telephone systems

Publications (2)

Publication Number Publication Date
CA2019000A1 true CA2019000A1 (en) 1990-12-23
CA2019000C CA2019000C (en) 1993-06-22

Family

ID=27005048

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002019000A Expired - Lifetime CA2019000C (en) 1989-06-23 1990-06-14 Cellular telephone responsive to service availability for operating on different cellular telephone systems

Country Status (2)

Country Link
JP (1) JP2699617B2 (en)
CA (1) CA2019000C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6606485B1 (en) * 1999-10-06 2003-08-12 Qualcomm, Incorporated Candidate system search and soft handoff between frequencies in a multi-carrier mobile communication system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151136A (en) * 1982-03-04 1983-09-08 Nec Corp Mobile radio communication system

Also Published As

Publication number Publication date
JP2699617B2 (en) 1998-01-19
JPH0335628A (en) 1991-02-15
CA2019000C (en) 1993-06-22

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry
MKEX Expiry

Effective date: 20100614